Slow cooker



FIG. 1 is a top perspective view of a slow cooker showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof; and,

FIG. 4 is a side elevation view thereof, the opposite side being a mirror image thereof.

The subject matter shown in broken lines is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a slow cooker, as shown and described. 